Search results for "antimicrobia"
showing 10 items of 715 documents
The influence of different types of fixed orthodontic appliance on the growth and adherence of microorganisms (in vitro study).
2012
Orthodontic appliances serve as different impact zones and modify microbial adherence and colonization, acting as foreign reserves and possible sources of infection. This study was conducted to investigate the effect of different types of fixed orthodontic appliances on the growth and adherence of microorganisms in oral flora which are Streptococcus mutans (S. mutans) and Candida albicans. Sixty-four of four different fixed orthodontic appliance-samples were used, divided into four groups of sixteen. Type I: Sapphire brackets- Coated wires, type II: Sapphire brackets- Stainless steel wires, type III: Stainless steel brackets- Coated wires and type IV: Stainless steel brackets- Stainless ste…
Antibacterial activity of different root canal sealers against Enterococcus faecalis
2017
Background The aim of the present study was to compare in vitro the antimicrobial activity of different root canal sealers against Enterococcus faecalis, prior and subsequent to setting. Material and methods Agar diffusion test (ADT) was used for evaluating the antibacterial activity of non-set sealer while the direct contact test (DCT) was used for after setting. Results ADT: Except for TotalFill BC Sealer all the others sealers tested showed antibacterial activity. BioRoot™RCS, MTA Fillapex and Sealapex Root Canal Sealer showed the lowest antibacterial activity, a significant increase in antibacterial effect for both Pulp Canal Sealer™ and AH plus sealers were found. Significantly higher …
Meningitis caused by Enterococcus gallinarum after lumbar drainage of cerebrospinal fluid.
2005
We report a rare case of meningitis caused by Enterococcus gallinarum, a bacterium characterized by its ability to express low-level resistance to vancomycin. As in the three other previously reported cases, this one occurred in a patient with a cerebrospinal fluid drainage catheter and properly responded to antimicrobial therapy and removal of the drain.
Effective killing of Borrelia burgdorferi in vitro with novel herbal compounds
2018
Introduction: The tick-borne disease Lyme Borreliosis is caused by Borrelia bacteria. The disease can persist even after treatment with antibiotics, which is why other methods of treatment are needed. Herbal compounds and phytochemicals have been recently examined in relation to eradicating Borrelia bacteria in vitro. Objective: The possible antimicrobial effect of two novel compounds, Biocidin Liquid and LSF Broad-Spectrum Liposomal formulas, was examined in the hopes of discovering an alternative method for eradication of Borrelia bacteria. Methods: The minimum inhibitory concentrations (MICs) and minimum bacterial deaths (MBDs), as well as, time-kill effect of each compound were utilize…
Antibacterial polypeptides of Lactobacillus species
1990
Twelve of 79 strains of the genus Lactobacillus, mainly isolated from plants or fermenting material, were found to inhibit at least one of the nine indicator strains of the species Lact. brevis, Pediococcus damnosus and Leucanostoc oenos. The antimicrobial activities from Lact. brevis B 37 and Lact. casei B 80 were caused by polypeptides detectable in the culture liquids. They are bacteriocins with a narrow antimicrobial spectrum. Brevicin 37 from Lact. brevis B 37 was active against many lactic acid bacteria and Nocardia corallina, whereas caseicin 80 from Lact. casei B 80 inhibits only one other strain of Lact. casei. Brevicin 37 is stable at 121dC, caseicin 80 is inactivated above 60dC, …
Antimicrobial and antistaphylococcal biofilm activity from the sea urchin Paracentrotus lividus
2010
Aims: Staphylococcal biofilm-associated infections are resistant to conventional antibiotics. Consequently, new agents are needed to treat them. With this aim, we focused on the effector cells (coelomocytes) of the sea urchin Paracentrotus lividus immune system. Methods and Results: We tested the activity of the 5-kDa peptide fraction of the cytosol from coelomocytes (5-CC) against a group of Gram-positive, Gram-negative bacteria and fungi. We determined minimal inhibitory concentrations (MICs) ranging from 253·7 to 15·8 mg ml−1. We observed an inhibitory activity and antibiofilm properties of 5-CC against staphylococcal biofilms of reference strains Staphylococcus epidermidis DSM 3269 an…
High resistance against clindamycin, metronidazole and amoxicillin in Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans isolates of …
2010
Objectives: To test the antimicrobial sensitivity of two periodontal pathogens to a panel of five orally administrable antibiotics in periodontal disease. Study design: A total of 69 isolates of Aggregatibacter actinomycetemcomitans and Porphyromonas gingivalis were processed using culture and biochemical tests. Selected colonies of A. actinomycetemcomitans and P. gingivalis were used to evaluate the antibacterial activity of clindamycin, metronidazole, amoxicillin, moxifloxacin and amoxicillin/clavulanic acid. Results: Susceptibility testing revealed a sensitivity of 100% of A. actinomycetemcomitans and P. gingivalis to moxifloxacin and amoxicillin/clavulanic acid but moderate susceptibili…
Identificación y caracterización funcional de genes PMT relacionados con la glicosilación de proteínas en el hongo patógeno de frutos cítricos Penici…
2013
En esta tesis se ha caracterizado el mecanismo de acción del péptido antifúngico PAF26 sobre S. cerevisiae como microorganismo modelo. Mediante microscopía confocal, se ha demostrado que PAF26 marcado fluorescentemente interactúa primero con las envueltas celulares, se internaliza en vacuolas y luego se libera al citoplasma coincidiendo con la muerte celular, de forma similar a lo observado en N. crassa. Se ha constatado que los dominios catiónicos e hidrofóbicos de PAF26 se requieren para su actividad, siendo el dominio catiónico necesario para su interacción y el dominio hidrofóbico para su internalización. El péptido se localizó principalmente en las vacuolas de la cepa resistente Δarg1,…
Synthesis, Structure and Antimicrobial Activity of New Co(II) Complex with bis-Morpholino/Benzoimidazole-s-Triazine Ligand
2023
A new Co(II) perchlorate complex of the bis-morpholino/benzoimidazole-s-triazine ligand, 4,4′-(6-(1H-benzo[d]imidazol-1-yl)-1,3,5-triazine-2,4-diyl)dimorpholine (BMBIT), was synthesized and characterized. The structure of the new Co(II) complex was approved to be [Co(BMBIT)2(H2O)4](ClO4)2*H2O using single-crystal X-ray diffraction. The Co(II) complex was found crystallized in the monoclinic crystal system and P21/c space group. The unit cell parameters are a = 22.21971(11) Å, b = 8.86743(4) Å, c = 24.38673(12) Å and β = 113.4401(6)°. This heteroleptic complex has distorted octahedral coordination geometry with two monodenatate BMBIT ligand units via the benzoimidazole N-atom and four water …
Sepsis in head and neck cancer patients treated with chemotherapy and radiation: literature review and consensus
2015
Abstract: The reporting of infection/sepsis in chemo/radiation-treated head and neck cancer patients is sparse and the problem is underestimated. A multidisciplinary group of head and neck cancer specialists from Italy met with the aim of reaching a consensus on a clinical definition and management of infections and sepsis. The Delphi appropriateness method was used for this consensus. External expert reviewers then evaluated the conclusions carefully according to their area of expertise. The paper contains seven clusters of statements about the clinical definition and management of infections and sepsis in head and neck cancer patients, which had a consensus. Furthermore, it offers a revie…